Here we go again. This was just covered here recently.
Here it is from the Ohio Revised Code
(E) "Automatic firearm" means any firearm designed or specially adapted to fire a succession of cartridges with a single function of the trigger. "Automatic firearm" also means any semi-automatic firearm designed or specially adapted to fire more than thirty-one cartridges without reloading, other than a firearm chambering only .22 caliber short, long, or long-rifle cartridges.
So, your Glock would become an "automatic firearm" with a mag of more than thirty-one cartridges.
In Ohio, "automatic firearms" are illegal unless they are NFA registered.
Now, unless you plan to boost a ride with your high cap gat, you're probably not going to get into any trouble. This is a stupid law that is only used when you are being charged with another crime.
For now, at least. In ten years, they may patrol the ranges looking for violators, who knows?